Answer:
Image result for What was the "Three Field System" and how did it revolutionize European agriculture?
The three-field system let farmers plant more crops and therefore increase production. ... Crop assignments were rotated every year, so each field segment would be planted for two out of every three years. Previously a "two field system" had been in place, with half the land being left fallow.
Explanation:
Reason #1: Even after the 15th amendment was ratified, some states still found ways to circumvent the Constitution and prevent all African-Americans from voting.
Reason #2: The Supreme Court struck it down in 1915, many states used the "grandfather clause" to keep descendents of slaves out of elections. The clause said you could not vote unless your grandfather had voted -- an impossibility for most people whose ancestors were slaves, African-Americans.
Reason #3: Discrimination practices also prevented African-Americans from voting.
Government benefits provided to the needy, usually in the form of cash or vouchers.
The 1920 United States census recorded that 51.2% of the population was living in urban areas. Since the census is taken only every ten years, we don't really have great data for the years in between, so 1920 is the closest we have to a year where the urban/rural split was roughly 50/50.
European cities began to grow around tbe year 1000 because of the fact that northern Europeans lived on rich, fertile plains, that they could farm a variety of crops. Turn around and sell to make a profit.
